Siemens SIRIUS 3RT2015-1HB42 Power Contactor 3-Pole, 7A, 3kW, 24V DC, S00, 1NC Aux Original Brand New

Overview

The Siemens 3RT2015-1HB42 is a high-performance, compact power contactor from the globally renowned SIRIUS 3RT20 series. Specifically engineered for switching motors and general resistive loads, this 3-pole contactor is rated for $7\text{ A}$ (AC-3e/AC-3) and a power of $3\text{ kW}$ at $400\text{ V}$. Its unique 24 V DC coil with an extended operating range (0.7−1.25∗Uc​) and integrated suppressor diode makes it an ideal PLC output contactor for modern automation systems. This Size S00 contactor features a durable, space-saving design and reliable screw terminals for secure wiring.

Key Features & Technical Specification

• Product Number: 3RT2015-1HB42
• Series: Siemens SIRIUS 3RT20 (part of the modular SIRIUS system)
• Contactor Type: Power Contactor (Motor Contactor)
• Number of Poles: 3-pole (Main Contacts: 3 NO)
• Operational Current: $7\text{ A}$ (AC-3e/AC-3 at $400\text{ V}$)
• Rated Power: $3\text{ kW}$ at $400\text{ V}$
• Coil Voltage (Control Voltage): $24\text{ V DC}$
• Coil Operating Range: 0.7−1.25∗Uc​ (Suitable for PLC outputs)
• Auxiliary Contacts: Integrated 1 NC (Normally Closed)
• Connection Type: Screw Terminal
• Frame Size: S00
• Expandability: No auxiliary switch can be added (dedicated type for coupling/PLC control).
• Installation: DIN rail or screw fastening.

Benefit

1. Optimized for PLC Integration: The $24\text{ V DC}$ solenoid coil and extended voltage tolerance are perfectly suited for direct operation by Programmable Logic Controllers (PLCs), simplifying control circuitry.
2. Compact and Space-Saving: The S00 frame size minimizes panel space requirements without compromising performance, essential for small or high-density enclosures.
3. High Reliability: Part of the SIRIUS modular system, ensuring high contact reliability and a long mechanical service life ($30$ million switching cycles typical).
4. Secure and Easy Wiring: Robust screw terminals ensure a reliable, vibration-proof connection for both main and control circuits.
5. Global Compliance: Climate-resistant and approved for worldwide use (e.g., IEC and UL/CSA), making it an IE3/IE4-ready global standard product.

Function and Application

The Siemens 3RT2015-1HB42 power contactor functions as an electromechanical switching device. It is primarily used to safely and reliably switch electrical loads such as:

• Electric Motors: Up to $3\text{ kW}$ (e.g., pumps, fans, conveyors) in a $400\text{ V}$ system.
• Resistive Loads: Heating elements, lighting circuits, etc.
• Coupling/Interface: Serving as an interface between the low-power control circuit ($24\text{ V DC}$ from a PLC) and the high-power main circuit.

Its integrated $1\text{ NC}$ auxiliary contact provides feedback or interlocking capabilities within the control circuit.

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